The internal sex organs include the vagina, uterus, fallopian tubes, and ovaries. The vagina is between 7 and 15 centimetres in length, and is a closed, tubular structure that extends from the opening of the vagina to the uterus. The vagina has muscular walls lined with mucous membranes, which serves as the female organ of copulation (sexual intercourse) as well as the birth canal. The vagina connects with the uterus, which is shaped like an inverted pear. This muscular, expandable organ with thick walls is also called the womb, which holds the developing foetus during pregnancy. At the lower part of the uterus is the cervix, which opens into the vagina. At the upper part, the fallopian tubes connect the uterus to the ovaries. The ovaries are two oval-shaped organs that lie either side of the uterus. They produce, store, and release eggs through the fallopian tubes into the uterus. The ovaries also produce the hormones oestrogen and progesterone. The breasts are also part of the reproductive system. Mammary glands inside the breasts secrete milk after childbirth.
(published with permission in writing from:http://www.natracare.com)
